I've mentioned several times of being able to use more common measurement units. Rather than just quants, one could configure something in the preferences to set the map scale as needed.

As a side note, about 16384 quants diameter is a medium-sized level. 32768 is large, 65536 is huge, and 131072 is gigantic. My 3D game's levels are based on the 262144 size which, after working out the numbers, is a bit over 6 miles diameter. Levels can, theoretically, go as far out as 2,097,152 quants from the origin meaning close to about 9860 square miles of land (and with other tricks, you can exceed this; assumes that 8 quants makes 1 foot).